databases use different names than standard

[smemsh]

from the command line utility provided by libc, getent --help:

Supported databases:
ahosts ahostsv4 ahostsv6 aliases ethers group gshadow hosts initgroups
netgroup networks passwd protocols rpc services shadow

many of these are different names than the ones found in this library:

__all__ = (
    'alias', 'group', 'host', 'network', 'passwd', 'proto', 'rpc', 'service',
    'shadow', 'netgroup'
)

for consistency, it would be good if these used the same database names as the library itself. I found the remapping of hosts -> host and services -> service particularly confusing since they don't even match up to the name in /etc/ when nsswitch is using files as the backend.